Alexander Litvinenko: Inquiry into ex-Russian spy's death under way

A public inquiry has opened into the death of the former Russian spy Alexander Litvinenko.

Speaking on the first day of the inquiry in London, a barrister representing Mr Litvinenko's widow described his murder, eight years ago, as an act of "nuclear terrorism" on the streets of a major city.

Mr Litvinenko died in hospital, nearly three weeks after drinking tea laced with radioactive polonium while meeting two Russians in London.

Moscow has refused to extradite the men, Andrei Lugovoi and Dmitry Kovtun, both of whom deny any involvement.

Gordon Corera reports.